1687020016808 has 32 divisors (see below), whose sum is σ = 3639304944000. Its totient is φ = 718156168512.

The previous prime is 1687020016753. The next prime is 1687020016823. The reversal of 1687020016808 is 8086100207861.

It is a happy number.

It is a super-2 number, since 2×1687020016808² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101083460 + ... + 101100147.

It is an arithmetic number, because the mean of its divisors is an integer number (113728279500).

Almost surely, 2^{1687020016808} is an apocalyptic number.

It is an amenable number.

1687020016808 is an abundant number, since it is smaller than the sum of its proper divisors (1952284927192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1687020016808 is a wasteful number, since it uses less digits than its factorization.

1687020016808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202183769 (or 202183765 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 1687020016808 in words is "one trillion, six hundred eighty-seven billion, twenty million, sixteen thousand, eight hundred eight".